Blu-ray Disc (also known as Blu-ray or BD) is an optical disc storage media format. Its main uses are high-definition video and data storage. The disc has the same dimensions as a standard DVD.The name Blu-ray Disc is derived from the blue-violet laser used to read and write this type of disc. Because of its shorter wavelength (405 nm), substantially more data can be stored on a Blu-ray Disc than on the DVD format, which uses a red (650 nm) laser. A Blu-ray Disc can store 50 GB, almost six times the capacity of a DVD.Blu-ray was developed by the Blu-ray Disc Association, a group of companies representing consumer electronics, computer hardware, and motion picture production.
WAL-MART, the largest U.S. retailer, said it would phase out the sales of HD DVD offerings and exclusively offer high-definition Blu-ray hardware and DVDs by the middle of this year.Wal-Mart's rejection of HD DVD is a sign that Blu-ray is catching on with retailers. Best Buy earlier this week said it would recommend users to buy Blu-ray products, though it would continue offering HD DVD products. Movie rental chains Netflix and Blockbuster recently abandoned HD DVD in favor of Blu-ray DVD offerings.Six of eight major movie studios publish Blu-ray DVDs, including Walt Disney, Fox, Lionsgate, Metro-Goldwyn-Mayer Studios, Sony and Warner Bros. Only two major movie studios, Paramount Home Entertainment and Universal Studios Home Entertainment, publish in the HD DVD format.The Blu-ray format has also seen a spate of victories in the gaming and consumer electronics industries, with companies like Philips adopting the format over HD DVD.
Blu-ray supporters include Sony, Panasonic and Samsung, while Toshiba, Microsoft and Intel are among the companies supporting HD DVD.
Its an agreement made,that all films released by MOTION PICTURES,WARNERS BROS.,COLUMBIA PICTURES WILL BE IN BLU RAY DISC,replacing DVD
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